Skip to main content

Geting controls inside a table in javascript

Often we need to navigate in html container controls like table, div, p etc through JavaScript for doing some type of validation or another task with child of that container control for that we need to
find the all controls (Textbox,Div,H1,Tr,Td etc.) in that container block.

JavaScript have a built-in function named getElementsByTagName by which we can find any type of control inside any container control like to find textbox (as it is a input control type text) we can use getElementsByTagName(input) and further match the type of control if type=text then textbox if type=select then dropdown if type=radio then radio button etc..

Type:-

radio (Radiobutton)
checkbox (Checkbox)
text (Textbox)
select (Dropdown)



<script>
   var tblobj= document.getElementById('<%=tbl.ClientID%>');
   var inputCol = tblobj.getElementsByTagName('input');
   var DivCol = tblobj.getElementsByTagName('div');
   var TdCol = tblobj.getElementsByTagName('Td'); 
</script>



An Example:-

<script>
function GetAllChilds() {
   var tblobj= document.getElementById('<%=tbl.ClientID%>');
   var tblTxtCol = tblobj.getElementsByTagName('input');
   for (var i = 0; i < tblTxtCollection.length; i++) {
       if (tblTxtCollection[i].type == "text") {
            //Do something with textbox
      }
    }
  }
</script>




Popular posts from this blog

Uploading large file in chunks in Asp.net Mvc c# from Javascript ajax

Often we have a requirement to upload files in Asp.net, Mvc c# application but when it comes to uploading larger file, we always think how to do it as uploading large file in one go have many challenges like UI responsiveness, If network fluctuate for a moment in between then uploading task get breaks and user have to upload it again etc.

How to handle click event of linkbutton inside gridview

Recently I have posted how to sort only current page of gridview, Scrollble gridview with fixed header through javascript, File upload control inside gridview during postback and now i am going to explain how to handle click event of linkbutton or any button type control inside gridview.

We can handle click event of any button type control inside gridview by two way first is through event bubbling and second one is directly (in this type of event handling we need to access current girdviewrow container)

how $document.ready() is different from window.onload()

we often use window.onload() in javascript and $document.ready() in jquery and assume that both are same just jquery library wrap up javascript window.onload() and introduce $document.ready() but no there is much difference between them below is the explanation -

What is NameSpace in .Net

This a basic question which allways asked in the interview that what is the namespace ,do you know about namespace,can you tell me some words about namespace.

Merging multiple PDFs using iTextSharp in asp.net c#

In this article i will show you how to merge multiple pdfs into one using ITextSharp below is the two approach one is to pass your input files path, output file path (will be created if not exist) and another is pass direct input stream, output stream and it will write the merge files into output stream.